Reorganized code + migration to go1.22

api/api.go

@@ -0,0 +1,332 @@
+package api
+
+import (
+	"errors"
+	"github.com/gin-gonic/gin"
+	"github.com/google/uuid"
+	"log/slog"
+	"net/http"
+	"payment-poc/domain/database"
+	"payment-poc/domain/providers"
+	"payment-poc/domain/providers/mock"
+	stripe2 "payment-poc/domain/providers/stripe"
+	"payment-poc/domain/providers/viva"
+	wspay2 "payment-poc/domain/providers/wspay"
+	"payment-poc/domain/state"
+	"strconv"
+	"time"
+)
+
+func NoMethod() gin.HandlerFunc {
+	return func(c *gin.Context) {
+		c.JSON(http.StatusNotFound, gin.H{
+			"status":  404,
+			"created": time.Now(),
+			"message": "no handler for method '" + c.Request.Method + "'",
+		})
+	}
+}
+
+func NoRoute() gin.HandlerFunc {
+	return func(c *gin.Context) {
+		c.JSON(http.StatusNotFound, gin.H{
+			"status":  404,
+			"created": time.Now(),
+			"message": "no handler for " + c.Request.Method + " '" + c.Request.URL.RequestURI() + "'",
+		})
+	}
+}
+
+func RefreshPayment(entryProvider *database.PaymentEntryProvider, paymentGateways map[state.PaymentGateway]providers.PaymentProvider) gin.HandlerFunc {
+	return func(c *gin.Context) {
+		id := uuid.MustParse(c.Param("id"))
+		entry, err := entryProvider.FetchById(id)
+		if err != nil {
+			c.AbortWithError(http.StatusBadRequest, err)
+			return
+		}
+		if paymentGateway, ok := paymentGateways[entry.Gateway]; ok {
+			slog.Info("fetching payment info", "entry_id", entry.Id.String(), "state", entry.State)
+			entry, err = paymentGateway.UpdatePayment(entry)
+			if err == nil {
+				entryProvider.UpdateEntry(entry)
+				slog.Info("fetched payment info", "entry_id", entry.Id.String(), "state", entry.State)
+			}
+			c.Redirect(http.StatusSeeOther, "/entries/"+id.String())
+		} else {
+			if err != nil {
+				c.AbortWithError(http.StatusInternalServerError, errors.New("payment gateway not supported: "+string(entry.Gateway)))
+				return
+			}
+		}
+	}
+}
+
+func CancelPayment(entryProvider *database.PaymentEntryProvider, paymentGateways map[state.PaymentGateway]providers.PaymentProvider) gin.HandlerFunc {
+	return func(c *gin.Context) {
+		id := uuid.MustParse(c.Param("id"))
+		entry, err := entryProvider.FetchById(id)
+		if err != nil {
+			c.AbortWithError(http.StatusBadRequest, err)
+			return
+		}
+		if paymentGateway, ok := paymentGateways[entry.Gateway]; ok {
+			slog.Info("canceling payment", "entry_id", id.String(), "state", entry.State)
+			entry, err = paymentGateway.CancelTransaction(entry)
+			if err == nil {
+				entryProvider.UpdateEntry(entry)
+				slog.Info("canceled payment", "entry_id", entry.Id.String(), "state", entry.State)
+				c.Redirect(http.StatusSeeOther, "/entries/"+id.String())
+			} else {
+				c.AbortWithError(http.StatusInternalServerError, err)
+				return
+			}
+		} else {
+			if err != nil {
+				c.AbortWithError(http.StatusInternalServerError, errors.New("payment gateway not supported: "+string(entry.Gateway)))
+				return
+			}
+		}
+	}
+}
+
+func CompletePayment(entryProvider *database.PaymentEntryProvider, paymentGateways map[state.PaymentGateway]providers.PaymentProvider) gin.HandlerFunc {
+	return func(c *gin.Context) {
+		id := uuid.MustParse(c.Param("id"))
+		entry, err := entryProvider.FetchById(id)
+		if err != nil {
+			c.AbortWithError(http.StatusBadRequest, err)
+			return
+		}
+		if paymentGateway, ok := paymentGateways[entry.Gateway]; ok {
+			amount, err := fetchAmount(c.PostForm("amount"))
+			if err != nil {
+				c.AbortWithError(http.StatusBadRequest, err)
+				return
+			}
+			slog.Info("completing payment with amount", "entry_id", id.String(), "state", entry.State, "amount", float64(amount)/100.0)
+			entry, err = paymentGateway.CompleteTransaction(entry, amount)
+			if err == nil {
+				entryProvider.UpdateEntry(entry)
+				slog.Info("completed payment", "entry_id", id.String(), "state", entry.State)
+				c.Redirect(http.StatusSeeOther, "/entries/"+id.String())
+			} else {
+				c.AbortWithError(http.StatusInternalServerError, err)
+				return
+			}
+		} else {
+			if err != nil {
+				c.AbortWithError(http.StatusInternalServerError, errors.New("payment gateway not supported: "+string(entry.Gateway)))
+				return
+			}
+		}
+	}
+}
+
+func GetEntry(provider *database.PaymentEntryProvider) gin.HandlerFunc {
+	return func(c *gin.Context) {
+		id := uuid.MustParse(c.Param("id"))
+		entry, err := provider.FetchById(id)
+		if err != nil {
+			c.AbortWithError(http.StatusBadRequest, err)
+			return
+		}
+		c.HTML(200, "info.gohtml", gin.H{"Entry": entry})
+	}
+}
+
+func InitializePayment(entryProvider *database.PaymentEntryProvider, paymentGateways map[state.PaymentGateway]providers.PaymentProvider) gin.HandlerFunc {
+	return func(c *gin.Context) {
+		gateway, err := fetchGateway(c.Param("gateway"))
+		if err != nil {
+			c.AbortWithError(http.StatusBadRequest, err)
+			return
+		}
+		if paymentGateway, contains := paymentGateways[gateway]; contains {
+			amount, err := fetchAmount(c.Query("amount"))
+			if err != nil {
+				c.AbortWithError(http.StatusBadRequest, err)
+				return
+			}
+			entry, err := entryProvider.CreateEntry(database.PaymentEntry{
+				Gateway:     gateway,
+				State:       state.StatePreinitialized,
+				TotalAmount: amount,
+			})
+			slog.Info("creating payment", "entry_id", entry.Id.String(), "state", entry.State, "gateway", gateway, "amount", float64(amount)/100.0)
+			if entry, url, err := paymentGateway.CreatePaymentUrl(entry); err == nil {
+				slog.Info("created redirect url", "entry_id", entry.Id.String(), "state", entry.State)
+				entryProvider.UpdateEntry(entry)
+				c.Redirect(http.StatusSeeOther, url)
+			} else {
+				c.AbortWithError(http.StatusBadRequest, err)
+				return
+			}
+		} else {
+			c.AbortWithError(http.StatusBadRequest, errors.New("unsupported payment gateway: "+string(gateway)))
+			return
+		}
+	}
+}
+
+func GetGateways(gateways map[state.PaymentGateway]providers.PaymentProvider) gin.HandlerFunc {
+	return func(c *gin.Context) {
+		amount, err := strconv.ParseFloat(c.Query("amount"), 64)
+		if err != nil {
+			amount = 10.00
+		}
+		c.HTML(200, "methods.gohtml", gin.H{"Amount": amount, "Gateways": mapGateways(gateways)})
+	}
+}
+
+func GetIndex(provider *database.PaymentEntryProvider) gin.HandlerFunc {
+	return func(c *gin.Context) {
+		entries, _ := provider.FetchAll()
+		c.HTML(200, "index.gohtml", gin.H{"Entries": entries})
+	}
+}
+
+func VivaOnFailure(vivaService viva.Service, provider *database.PaymentEntryProvider) gin.HandlerFunc {
+	return func(c *gin.Context) {
+		url, err := vivaService.HandleResponse(c, provider, state.StateError)
+		if err != nil {
+			c.AbortWithError(http.StatusInternalServerError, err)
+			return
+		}
+		c.Redirect(http.StatusSeeOther, url)
+	}
+}
+
+func VivaOnSuccess(vivaService viva.Service, provider *database.PaymentEntryProvider) gin.HandlerFunc {
+	return func(c *gin.Context) {
+		url, err := vivaService.HandleResponse(c, provider, state.StateAccepted)
+		if err != nil {
+			c.AbortWithError(http.StatusInternalServerError, err)
+			return
+		}
+		c.Redirect(http.StatusSeeOther, url)
+	}
+}
+
+func StripeOnFailure(stripeService stripe2.Service, provider *database.PaymentEntryProvider) gin.HandlerFunc {
+	return func(c *gin.Context) {
+		url, err := stripeService.HandleResponse(c, provider, state.StateError)
+		if err != nil {
+			c.AbortWithError(http.StatusInternalServerError, err)
+			return
+		}
+		c.Redirect(http.StatusSeeOther, url)
+	}
+}
+
+func StripeOnSuccess(stripeService stripe2.Service, provider *database.PaymentEntryProvider) gin.HandlerFunc {
+	return func(c *gin.Context) {
+		url, err := stripeService.HandleResponse(c, provider, state.StateAccepted)
+		if err != nil {
+			c.AbortWithError(http.StatusInternalServerError, err)
+			return
+		}
+		c.Redirect(http.StatusSeeOther, url)
+	}
+}
+
+func WsPayOnFailure(wspayService wspay2.Service, provider *database.PaymentEntryProvider, finalState state.PaymentState) gin.HandlerFunc {
+	return func(c *gin.Context) {
+		url, err := wspayService.HandleErrorResponse(c, provider, finalState)
+		if err != nil {
+			c.AbortWithError(http.StatusInternalServerError, err)
+			return
+		}
+		c.Redirect(http.StatusSeeOther, url)
+	}
+}
+
+func WsPayOnSuccess(wspayService wspay2.Service, provider *database.PaymentEntryProvider) gin.HandlerFunc {
+	return func(c *gin.Context) {
+		url, err := wspayService.HandleSuccessResponse(c, provider)
+		if err != nil {
+			c.AbortWithError(http.StatusInternalServerError, err)
+			return
+		}
+		c.Redirect(http.StatusSeeOther, url)
+	}
+}
+
+func MockOnFailure(mockService mock.Service, provider *database.PaymentEntryProvider) gin.HandlerFunc {
+	return func(c *gin.Context) {
+		url, err := mockService.HandleResponse(c, provider, state.StateError)
+		if err != nil {
+			c.AbortWithError(http.StatusInternalServerError, err)
+			return
+		}
+		c.Redirect(http.StatusSeeOther, url)
+	}
+}
+
+func MockOnSuccess(mockService mock.Service, provider *database.PaymentEntryProvider) gin.HandlerFunc {
+	return func(c *gin.Context) {
+		url, err := mockService.HandleResponse(c, provider, state.StateAccepted)
+		if err != nil {
+			c.AbortWithError(http.StatusInternalServerError, err)
+			return
+		}
+		c.Redirect(http.StatusSeeOther, url)
+	}
+}
+
+func MockOpenGateway(provider *database.PaymentEntryProvider) gin.HandlerFunc {
+	return func(c *gin.Context) {
+		id := uuid.MustParse(c.Param("id"))
+		entry, err := provider.FetchById(id)
+		if err != nil {
+			c.AbortWithError(http.StatusBadRequest, err)
+			return
+		}
+		c.HTML(http.StatusOK, "mock_gateway.gohtml", gin.H{"Entry": entry})
+	}
+}
+
+func mapGateways(gateways map[state.PaymentGateway]providers.PaymentProvider) map[string]string {
+	providerMap := map[string]string{}
+
+	for key := range gateways {
+		providerMap[string(key)] = mapGatewayName(key)
+	}
+	return providerMap
+}
+
+func mapGatewayName(key state.PaymentGateway) string {
+	switch key {
+	case state.GatewayStripe:
+		return "Stripe"
+	case state.GatewayVivaWallet:
+		return "Viva wallet"
+	case state.GatewayWsPay:
+		return "WsPay"
+	case state.GatewayMock:
+		return "mock"
+	}
+	return ""
+}
+
+func fetchGateway(gateway string) (state.PaymentGateway, error) {
+	switch gateway {
+	case string(state.GatewayWsPay):
+		return state.GatewayWsPay, nil
+	case string(state.GatewayStripe):
+		return state.GatewayStripe, nil
+	case string(state.GatewayVivaWallet):
+		return state.GatewayVivaWallet, nil
+	case string(state.GatewayMock):
+		return state.GatewayMock, nil
+	}
+	return "", errors.New("unknown gateway: " + gateway)
+}
+
+func fetchAmount(amount string) (int64, error) {
+	if amount, err := strconv.ParseFloat(amount, 64); err == nil {
+		return int64(amount * 100), nil
+	} else {
+		return 0, err
+	}
+}

api/middleware.go

@@ -0,0 +1,39 @@
+package api
+
+import (
+	"fmt"
+	"github.com/gin-gonic/gin"
+	"os"
+	"strings"
+)
+
+func Auth() gin.HandlerFunc {
+	if !hasProfile("no-auth") {
+		return gin.BasicAuth(loadAuth())
+	}
+	return nil
+}
+
+func hasProfile(value string) bool {
+	profileOptions := strings.Split(os.Getenv("PROFILE"), ",")
+	for _, option := range profileOptions {
+		if option == value {
+			return true
+		}
+	}
+	return false
+}
+
+func loadAuth() map[string]string {
+	credentials := envMustExist("AUTH")
+	values := strings.Split(credentials, ":")
+	return map[string]string{values[0]: values[1]}
+}
+
+func envMustExist(env string) string {
+	if value, exists := os.LookupEnv(env); !exists {
+		panic(fmt.Sprintf("env variable '%s' not defined", env))
+	} else {
+		return value
+	}
+}

api/routes.go

@@ -0,0 +1,84 @@
+package api
+
+import (
+	"github.com/gin-gonic/gin"
+	"github.com/jmoiron/sqlx"
+	"log/slog"
+	"payment-poc/domain/database"
+	"payment-poc/domain/providers"
+	"payment-poc/domain/providers/mock"
+	stripe2 "payment-poc/domain/providers/stripe"
+	"payment-poc/domain/providers/viva"
+	wspay2 "payment-poc/domain/providers/wspay"
+	"payment-poc/domain/state"
+)
+
+func RegisterRoutes(server *gin.Engine, db *sqlx.DB) {
+
+	backendUrl := envMustExist("BACKEND_URL")
+
+	paymentGateways := map[state.PaymentGateway]providers.PaymentProvider{}
+	entryProvider := &database.PaymentEntryProvider{DB: db}
+
+	server.GET("/", GetIndex(entryProvider))
+	server.GET("/methods", GetGateways(paymentGateways))
+	server.GET("/methods/:gateway", InitializePayment(entryProvider, paymentGateways))
+	server.GET("/entries/:id", GetEntry(entryProvider))
+	server.POST("/entries/:id/complete", CompletePayment(entryProvider, paymentGateways))
+	server.POST("/entries/:id/cancel", CancelPayment(entryProvider, paymentGateways))
+	server.POST("/entries/:id/refresh", RefreshPayment(entryProvider, paymentGateways))
+
+	if hasProfile(string(state.GatewayMock)) {
+		mockService := mock.Service{
+			BackendUrl: backendUrl,
+		}
+		paymentGateways[state.GatewayMock] = &mockService
+		mockGroup := server.Group("mock")
+		mockGroup.GET("/gateway/:id", MockOpenGateway(entryProvider))
+		mockGroup.GET("success", MockOnSuccess(mockService, entryProvider))
+		mockGroup.GET("error", MockOnFailure(mockService, entryProvider))
+
+		slog.Info("Registered provider", slog.Any("provider", state.GatewayMock))
+	}
+	if hasProfile(string(state.GatewayWsPay)) {
+		wspayService := wspay2.Service{
+			ShopId:     envMustExist("WSPAY_SHOP_ID"),
+			ShopSecret: envMustExist("WSPAY_SHOP_SECRET"),
+			BackendUrl: backendUrl,
+		}
+		paymentGateways[state.GatewayWsPay] = &wspayService
+		wspayGroup := server.Group("wspay")
+		wspayGroup.GET("success", WsPayOnSuccess(wspayService, entryProvider))
+		wspayGroup.GET("error", WsPayOnFailure(wspayService, entryProvider, state.StateError))
+		wspayGroup.GET("cancel", WsPayOnFailure(wspayService, entryProvider, state.StateCanceled))
+
+		slog.Info("Registered provider", slog.Any("provider", state.GatewayWsPay))
+	}
+	if hasProfile(string(state.GatewayStripe)) {
+		stripeService := stripe2.Service{
+			ApiKey:     envMustExist("STRIPE_KEY"),
+			BackendUrl: backendUrl,
+		}
+		paymentGateways[state.GatewayStripe] = &stripeService
+		stripeGroup := server.Group("stripe")
+		stripeGroup.GET("success", StripeOnSuccess(stripeService, entryProvider))
+		stripeGroup.GET("error", StripeOnFailure(stripeService, entryProvider))
+
+		slog.Info("Registered provider", slog.Any("provider", state.GatewayStripe))
+	}
+	if hasProfile(string(state.GatewayVivaWallet)) {
+		vivaService := viva.Service{
+			ClientId:     envMustExist("VIVA_WALLET_CLIENT_ID"),
+			ClientSecret: envMustExist("VIVA_WALLET_CLIENT_SECRET"),
+			SourceCode:   envMustExist("VIVA_WALLET_SOURCE_CODE"),
+			MerchantId:   envMustExist("VIVA_WALLET_MERCHANT_ID"),
+			ApiKey:       envMustExist("VIVA_WALLET_API_KEY"),
+		}
+		paymentGateways[state.GatewayVivaWallet] = &vivaService
+		vivaGroup := server.Group("viva")
+		vivaGroup.GET("success", VivaOnSuccess(vivaService, entryProvider))
+		vivaGroup.GET("error", VivaOnFailure(vivaService, entryProvider))
+
+		slog.Info("Registered provider", slog.Any("provider", state.GatewayVivaWallet))
+	}
+}

api/server.go

@@ -0,0 +1,25 @@
+package api
+
+import (
+	"github.com/gin-gonic/gin"
+	"github.com/jmoiron/sqlx"
+)
+
+func SetupServer(db *sqlx.DB) *gin.Engine {
+	server := createServer()
+	LoadTemplates(server)
+	RegisterRoutes(server, db)
+	return server
+}
+
+func createServer() *gin.Engine {
+	server := gin.New()
+	server.NoRoute(NoRoute())
+	server.NoMethod(NoMethod())
+	server.Use(gin.Recovery())
+	auth := Auth()
+	if auth != nil {
+		server.Use(Auth())
+	}
+	return server
+}

api/templates.go

@@ -0,0 +1,64 @@
+package api
+
+import (
+	"fmt"
+	"github.com/gin-gonic/gin"
+	"html/template"
+	"payment-poc/domain/state"
+)
+
+func LoadTemplates(server *gin.Engine) {
+	server.SetFuncMap(template.FuncMap{
+		"formatCurrency":    formatCurrency,
+		"formatCurrencyPtr": formatCurrencyPtr,
+		"decimalCurrency":   decimalCurrency,
+		"formatState":       formatState,
+		"omitempty":         omitempty,
+	})
+	server.LoadHTMLGlob("./templates/*.gohtml")
+}
+
+func formatState(stt state.PaymentState) string {
+	switch stt {
+	case state.StateCanceled:
+		return "Otkazana"
+	case state.StateVoided:
+		return "Poništena"
+	case state.StateAccepted:
+		return "Predautorizirana"
+	case state.StateError:
+		return "Greška"
+	case state.StatePreinitialized:
+		return "Predinicijalizirana"
+	case state.StateInitialized:
+		return "Inicijalizirana"
+	case state.StateCanceledInitialization:
+		return "Otkazana tijekom izrade"
+	case state.StateCompleted:
+		return "Autorizirana"
+	}
+	return "nepoznato stanje '" + string(stt) + "'"
+}
+
+func formatCurrency(current int64) string {
+	return fmt.Sprintf("%d,%02d", current/100, current%100)
+}
+
+func formatCurrencyPtr(current *int64) string {
+	if current != nil {
+		return fmt.Sprintf("%d,%02d", (*current)/100, (*current)%100)
+	} else {
+		return "-"
+	}
+}
+
+func decimalCurrency(current int64) string {
+	return fmt.Sprintf("%d,%02d", current/100, current%100)
+}
+
+func omitempty(value string) string {
+	if value == "" {
+		return "-"
+	}
+	return value
+}

db.go

@@ -15,15 +15,25 @@ func envMustExist(env string) string {
 	}
 }
 
+func envOrDefault(env string, defaultValue string) string {
+	if value, exists := os.LookupEnv(env); exists {
+		return value
+	} else {
+		return defaultValue
+	}
+}
+
 func connectToDb() (*sqlx.DB, error) {
 	host := envMustExist("PSQL_HOST")
 	port := envMustExist("PSQL_PORT")
 	user := envMustExist("PSQL_USER")
 	password := envMustExist("PSQL_PASSWORD")
 	dbname := envMustExist("PSQL_DB")
+	sslMode := envOrDefault("PSQL_SSLMODE", "disable")
+	schema := envOrDefault("PSQL_SCHEMA", "public")
 
-	psqlInfo := fmt.Sprintf("host=%s port=%s user=%s password=%s dbname=%s sslmode=disable",
+	psqlInfo := fmt.Sprintf("host=%s port=%s user=%s password=%s dbname=%s sslmode=%s search_path=%s",
-		host, port, user, password, dbname)
+		host, port, user, password, dbname, sslMode, schema)
 
 	db, err := sqlx.Open("postgres", psqlInfo)
 	if err != nil {

db/dev/v1_0.sql

@@ -17,6 +17,7 @@ CREATE TABLE IF NOT EXISTS "payment_entry"
 
     "payment_intent_id" varchar(255) DEFAULT NULL,
 
+    "ws_pay_order_id" varchar(255) DEFAULT '',
     "shopping_card_id" varchar(255) DEFAULT NULL,
     "stan" varchar(255) DEFAULT NULL,
     "success" int DEFAULT NULL,

db/prod/v1_0.sql

@@ -0,0 +1,31 @@
+CREATE TABLE IF NOT EXISTS "payment_entry"
+(
+    "id" uuid NOT NULL,
+    "created" timestamp NOT NULL,
+    "modified" timestamp DEFAULT NULL,
+
+    "gateway" varchar(255) NOT NULL,
+    "state" varchar(255) NOT NULL,
+
+    "lang" varchar(16) DEFAULT NULL,
+    "error" varchar(255) DEFAULT NULL,
+
+    "amount" int DEFAULT NULL,
+    "total_amount" int NOT NULL,
+
+    "eci" varchar(255) DEFAULT NULL,
+
+    "payment_intent_id" varchar(255) DEFAULT NULL,
+
+    "ws_pay_order_id" varchar(255) DEFAULT '',
+    "shopping_card_id" varchar(255) DEFAULT NULL,
+    "stan" varchar(255) DEFAULT NULL,
+    "success" int DEFAULT NULL,
+    "approval_code" varchar(255) DEFAULT NULL,
+
+    "order_id" varchar(255) DEFAULT NULL,
+    "transaction_id" uuid DEFAULT NULL,
+    "event_id" varchar(255) DEFAULT NULL,
+
+    PRIMARY KEY (id)
+);

domain/database/model.go

@@ -2,7 +2,7 @@ package database
 
 import (
 	"github.com/google/uuid"
-	"payment-poc/state"
+	"payment-poc/domain/state"
 	"time"
 )
 
@@ -31,6 +31,7 @@ type PaymentEntry struct {
 	PaymentIntentId *string `db:"payment_intent_id"`
 
 	// wspay field
+	WsPayOrderId   string  `db:"ws_pay_order_id"`
 	ShoppingCardID *string `db:"shopping_card_id"`
 	STAN           *string `db:"stan"`
 	Success        *int    `db:"success"`

domain/database/provider.go

@@ -29,8 +29,8 @@ func (p *PaymentEntryProvider) UpdateEntry(entry PaymentEntry) (PaymentEntry, er
 	currentTime := time.Now()
 	entry.Modified = &currentTime
 
-	_, err := p.DB.Exec(`UPDATE "payment_entry" SET "modified" = $2, "state" = $3, "lang" = $4, "error" = $5, "amount" = $6, "eci" = $7, "payment_intent_id" = $8, "shopping_card_id" = $9, "stan" = $10, "success" = $11, "approval_code" = $12, "order_id" = $13, "transaction_id" = $14, "event_id" = $15 WHERE "id" = $1`,
+	_, err := p.DB.Exec(`UPDATE "payment_entry" SET "modified" = $2, "state" = $3, "lang" = $4, "error" = $5, "amount" = $6, "eci" = $7, "payment_intent_id" = $8, "shopping_card_id" = $9, "stan" = $10, "success" = $11, "approval_code" = $12, "order_id" = $13, "transaction_id" = $14, "event_id" = $15, "ws_pay_order_id" = $16 WHERE "id" = $1`,
-		&entry.Id, &entry.Modified, &entry.State, &entry.Lang, &entry.Error, &entry.Amount, &entry.ECI, &entry.PaymentIntentId, &entry.ShoppingCardID, &entry.STAN, &entry.Success, &entry.ApprovalCode, &entry.OrderId, &entry.TransactionId, &entry.EventId,
+		&entry.Id, &entry.Modified, &entry.State, &entry.Lang, &entry.Error, &entry.Amount, &entry.ECI, &entry.PaymentIntentId, &entry.ShoppingCardID, &entry.STAN, &entry.Success, &entry.ApprovalCode, &entry.OrderId, &entry.TransactionId, &entry.EventId, &entry.WsPayOrderId,
 	)
 	if err != nil {
 		return PaymentEntry{}, err

domain/providers/mock/service.go

@@ -0,0 +1,44 @@
+package mock
+
+import (
+	"github.com/gin-gonic/gin"
+	"github.com/google/uuid"
+	"log/slog"
+	database2 "payment-poc/domain/database"
+	"payment-poc/domain/state"
+)
+
+type Service struct {
+	BackendUrl string
+}
+
+func (s Service) UpdatePayment(entry database2.PaymentEntry) (updatedEntry database2.PaymentEntry, err error) {
+	return entry, nil
+}
+
+func (s Service) CreatePaymentUrl(entry database2.PaymentEntry) (updateEntry database2.PaymentEntry, url string, err error) {
+	return entry, "/mock/gateway/" + entry.Id.String(), nil
+}
+
+func (s Service) CompleteTransaction(entry database2.PaymentEntry, amount int64) (database2.PaymentEntry, error) {
+	entry.Amount = &amount
+	entry.State = state.StateCompleted
+	return entry, nil
+}
+
+func (s Service) CancelTransaction(entry database2.PaymentEntry) (database2.PaymentEntry, error) {
+	entry.State = state.StateVoided
+	return entry, nil
+}
+
+func (s Service) HandleResponse(c *gin.Context, provider *database2.PaymentEntryProvider, paymentState state.PaymentState) (string, error) {
+	id := uuid.MustParse(c.Query("id"))
+	entry, err := provider.FetchById(id)
+	if err != nil {
+		return "", err
+	}
+	entry.State = paymentState
+	_, err = provider.UpdateEntry(entry)
+	slog.Info("received authorization response", "entry_id", entry.Id.String(), "state", entry.State)
+	return "/entries/" + id.String(), err
+}

domain/providers/provider.go

@@ -0,0 +1,10 @@
+package providers
+
+import "payment-poc/domain/database"
+
+type PaymentProvider interface {
+	CreatePaymentUrl(entry database.PaymentEntry) (updatedEntry database.PaymentEntry, url string, err error)
+	CompleteTransaction(entry database.PaymentEntry, amount int64) (database.PaymentEntry, error)
+	CancelTransaction(entry database.PaymentEntry) (database.PaymentEntry, error)
+	UpdatePayment(entry database.PaymentEntry) (updatedEntry database.PaymentEntry, err error)
+}

domain/providers/stripe/service.go

@@ -6,9 +6,9 @@ import (
 	"github.com/stripe/stripe-go/v72"
 	"github.com/stripe/stripe-go/v72/checkout/session"
 	"github.com/stripe/stripe-go/v72/paymentintent"
-	"log"
+	"log/slog"
-	"payment-poc/database"
+	database2 "payment-poc/domain/database"
-	"payment-poc/state"
+	"payment-poc/domain/state"
 )
 
 type Service struct {
@@ -16,15 +16,19 @@ type Service struct {
 	BackendUrl string
 }
 
-func (s *Service) UpdatePayment(entry database.PaymentEntry) (updatedEntry database.PaymentEntry, err error) {
+func (s *Service) UpdatePayment(entry database2.PaymentEntry) (updatedEntry database2.PaymentEntry, err error) {
-	pi, err := paymentintent.Get(*entry.PaymentIntentId, nil)
+	client := paymentintent.Client{
+		B:   stripe.GetBackend(stripe.APIBackend),
+		Key: s.ApiKey,
+	}
+	pi, err := client.Get(*entry.PaymentIntentId, nil)
 	if err != nil {
 		return entry, err
 	}
 	newState := determineState(pi.Status)
 
 	if entry.State != newState && newState != "" {
-		log.Printf("[%s] updated state for %s -> %s", entry.Id.String(), entry.State, newState)
+		slog.Info("updated state", "entry_id", entry.Id.String(), "state", entry.State, "new_state", newState)
 		if pi.AmountReceived > 0 {
 			entry.Amount = &pi.AmountReceived
 		}
@@ -53,7 +57,7 @@ func determineState(status stripe.PaymentIntentStatus) state.PaymentState {
 	return ""
 }
 
-func (s *Service) CreatePaymentUrl(entry database.PaymentEntry) (database.PaymentEntry, string, error) {
+func (s *Service) CreatePaymentUrl(entry database2.PaymentEntry) (database2.PaymentEntry, string, error) {
 	entry, url, err := s.InitializePayment(entry)
 	if err != nil {
 		return entry, "", err
@@ -61,7 +65,7 @@ func (s *Service) CreatePaymentUrl(entry database.PaymentEntry) (database.Paymen
 	return entry, url, nil
 }
 
-func (s *Service) InitializePayment(entry database.PaymentEntry) (database.PaymentEntry, string, error) {
+func (s *Service) InitializePayment(entry database2.PaymentEntry) (database2.PaymentEntry, string, error) {
 
 	currency := string(stripe.CurrencyEUR)
 	productName := "Example product"
@@ -88,9 +92,13 @@ func (s *Service) InitializePayment(entry database.PaymentEntry) (database.Payme
 		SuccessURL: stripe.String(s.BackendUrl + "/stripe/success?token=" + entry.Id.String()),
 		CancelURL:  stripe.String(s.BackendUrl + "/stripe/cancel?token=" + entry.Id.String()),
 	}
-	result, err := session.New(params)
+	client := session.Client{
+		B:   stripe.GetBackend(stripe.APIBackend),
+		Key: s.ApiKey,
+	}
+	result, err := client.New(params)
 	if err != nil {
-		return database.PaymentEntry{}, "", err
+		return database2.PaymentEntry{}, "", err
 	}
 	entry.State = state.StateInitialized
 	entry.PaymentIntentId = &result.PaymentIntent.ID
@@ -98,15 +106,19 @@ func (s *Service) InitializePayment(entry database.PaymentEntry) (database.Payme
 	return entry, result.URL, nil
 }
 
-func (s *Service) CompleteTransaction(entry database.PaymentEntry, amount int64) (database.PaymentEntry, error) {
+func (s *Service) CompleteTransaction(entry database2.PaymentEntry, amount int64) (database2.PaymentEntry, error) {
 	params := &stripe.PaymentIntentCaptureParams{
 		AmountToCapture: stripe.Int64(amount),
 	}
-	pi, err := paymentintent.Capture(*entry.PaymentIntentId, params)
+	client := paymentintent.Client{
-	if err != nil {
+		B:   stripe.GetBackend(stripe.APIBackend),
-		return database.PaymentEntry{}, err
+		Key: s.ApiKey,
 	}
-	log.Printf("received state on completion: %v", pi.Status)
+	pi, err := client.Capture(*entry.PaymentIntentId, params)
+	if err != nil {
+		return database2.PaymentEntry{}, err
+	}
+	slog.Info("received state on completion", "entry_id", entry.Id.String(), "state", entry.State, "new_state", pi.Status)
 	newState := determineState(pi.Status)
 	entry.State = newState
 	if newState == state.StateCompleted || newState == state.StatePending {
@@ -115,20 +127,24 @@ func (s *Service) CompleteTransaction(entry database.PaymentEntry, amount int64)
 	return entry, nil
 }
 
-func (s *Service) CancelTransaction(entry database.PaymentEntry) (database.PaymentEntry, error) {
+func (s *Service) CancelTransaction(entry database2.PaymentEntry) (database2.PaymentEntry, error) {
 	params := &stripe.PaymentIntentCancelParams{}
-	pi, err := paymentintent.Cancel(*entry.PaymentIntentId, params)
+	client := paymentintent.Client{
-	if err != nil {
+		B:   stripe.GetBackend(stripe.APIBackend),
-		return database.PaymentEntry{}, err
+		Key: s.ApiKey,
 	}
-	log.Printf("received state on completion: %v", pi.Status)
+	pi, err := client.Cancel(*entry.PaymentIntentId, params)
+	if err != nil {
+		return database2.PaymentEntry{}, err
+	}
+	slog.Info("received state on completion", "entry_id", entry.Id.String(), "state", entry.State, "new_state", pi.Status)
 	if pi.Status == stripe.PaymentIntentStatusCanceled {
 		entry.State = state.StateCanceled
 	}
 	return entry, nil
 }
 
-func (s *Service) HandleResponse(c *gin.Context, provider *database.PaymentEntryProvider, paymentState state.PaymentState) (string, error) {
+func (s *Service) HandleResponse(c *gin.Context, provider *database2.PaymentEntryProvider, paymentState state.PaymentState) (string, error) {
 	id := uuid.MustParse(c.Query("token"))
 	entry, err := provider.FetchById(id)
 	if err != nil {
@@ -138,6 +154,6 @@ func (s *Service) HandleResponse(c *gin.Context, provider *database.PaymentEntry
 	if _, err := provider.UpdateEntry(entry); err != nil {
 		return "", err
 	}
-	log.Printf("[%s:%s] received authorization response", entry.Id.String(), entry.State)
+	slog.Info("received authorization response", "entry_id", entry.Id.String(), "state", entry.State)
 	return "/entries/" + entry.Id.String(), nil
 }

domain/providers/viva/service.go

@@ -8,11 +8,11 @@ import (
 	"github.com/gin-gonic/gin"
 	"github.com/google/uuid"
 	"io"
-	"log"
+	"log/slog"
 	"net/http"
 	"net/url"
-	"payment-poc/database"
+	database2 "payment-poc/domain/database"
-	"payment-poc/state"
+	"payment-poc/domain/state"
 	"strconv"
 	"time"
 )
@@ -29,7 +29,7 @@ type Service struct {
 	expiration time.Time
 }
 
-func (s *Service) UpdatePayment(entry database.PaymentEntry) (updatedEntry database.PaymentEntry, err error) {
+func (s *Service) UpdatePayment(entry database2.PaymentEntry) (updatedEntry database2.PaymentEntry, err error) {
 	token, err := s.oAuthToken()
 	httpResponse, err := createRequest(
 		"GET",
@@ -38,19 +38,23 @@ func (s *Service) UpdatePayment(entry database.PaymentEntry) (updatedEntry datab
 		[]byte{},
 	)
 	if err != nil {
-		return database.PaymentEntry{}, err
+		return database2.PaymentEntry{}, err
 	}
 
 	var response TransactionStatusResponse
 	err = readResponse(httpResponse, &response)
 	if err != nil {
-		return database.PaymentEntry{}, err
+		return database2.PaymentEntry{}, err
 	}
 	newState := determineStatus(response.StatusId)
 
 	if entry.State != newState && newState != "" {
-		log.Printf("[%s:%s] updated state %s -> %s", entry.Id.String(), entry.State, entry.State, newState)
+		slog.Info("updated state", "entry_id", entry.Id.String(), "state", entry.State, "new_state", newState)
 		entry.State = newState
+		if entry.State == state.StateCompleted {
+			amount := int64(response.Amount * 100)
+			entry.Amount = &amount
+		}
 	}
 	return entry, nil
 }
@@ -70,11 +74,11 @@ func determineStatus(id TransactionStatus) state.PaymentState {
 	case PaymentVoided:
 		return state.StateVoided
 	}
-	log.Printf("Unknonw transactionStatus: %s", string(id))
+	slog.Info("unknown transaction status", "status", string(id))
 	return ""
 }
 
-func (s *Service) CreatePaymentUrl(entry database.PaymentEntry) (database.PaymentEntry, string, error) {
+func (s *Service) CreatePaymentUrl(entry database2.PaymentEntry) (database2.PaymentEntry, string, error) {
 	entry, err := s.InitializePayment(entry)
 	if err != nil {
 		return entry, "", err
@@ -82,10 +86,10 @@ func (s *Service) CreatePaymentUrl(entry database.PaymentEntry) (database.Paymen
 	return entry, "https://demo.vivapayments.com/web/checkout?ref=" + string(*entry.OrderId), nil
 }
 
-func (s *Service) InitializePayment(entry database.PaymentEntry) (database.PaymentEntry, error) {
+func (s *Service) InitializePayment(entry database2.PaymentEntry) (database2.PaymentEntry, error) {
 	token, err := s.oAuthToken()
 	if err != nil {
-		return database.PaymentEntry{}, err
+		return database2.PaymentEntry{}, err
 	}
 
 	request := OrderRequest{
@@ -104,20 +108,20 @@ func (s *Service) InitializePayment(entry database.PaymentEntry) (database.Payme
 		toJson(request),
 	)
 	if err != nil {
-		return database.PaymentEntry{}, err
+		return database2.PaymentEntry{}, err
 	}
 
 	var response OrderResponse
 	err = readResponse(httpResponse, &response)
 	if err != nil {
-		return database.PaymentEntry{}, err
+		return database2.PaymentEntry{}, err
 	}
 	entry.State = state.StateInitialized
 	entry.OrderId = &response.OrderId
 	return entry, nil
 }
 
-func (s *Service) CompleteTransaction(entry database.PaymentEntry, amount int64) (database.PaymentEntry, error) {
+func (s *Service) CompleteTransaction(entry database2.PaymentEntry, amount int64) (database2.PaymentEntry, error) {
 	completionRequest := TransactionCompleteRequest{
 		Amount:              amount,
 		CustomerDescription: "Example transaction",
@@ -125,54 +129,55 @@ func (s *Service) CompleteTransaction(entry database.PaymentEntry, amount int64)
 	httpResponse, err := createRequest(
 		"POST",
 		"https://demo.vivapayments.com/api/transactions/"+entry.TransactionId.String(),
-		map[string]string{"authorization": "Bearer " + s.basicAuth(),
+		map[string]string{"authorization": "Basic " + s.basicAuth(),
 			"content-type": "application/json",
 		},
 		toJson(completionRequest),
 	)
 	if err != nil {
-		return database.PaymentEntry{}, err
+		return database2.PaymentEntry{}, err
 	}
 
 	var response TransactionResponse
 	err = readResponse(httpResponse, &response)
 	if err != nil {
-		return database.PaymentEntry{}, err
+		return database2.PaymentEntry{}, err
 	}
 	if response.StatusId == "F" {
-		paidAmount := int64(response.Amount * 100)
+		paidAmount := response.Amount * 100
 		entry.Amount = &paidAmount
 		entry.State = state.StateCompleted
 	} else {
-		return database.PaymentEntry{}, errors.New("received invalid status = " + response.StatusId)
+		return database2.PaymentEntry{}, errors.New("received invalid status = " + response.StatusId)
 	}
 	return entry, nil
 }
 
-func (s *Service) CancelTransaction(entry database.PaymentEntry) (database.PaymentEntry, error) {
+func (s *Service) CancelTransaction(entry database2.PaymentEntry) (database2.PaymentEntry, error) {
+	amount := strconv.FormatInt(entry.TotalAmount, 10)
 	httpResponse, err := createRequest(
 		"DELETE",
-		"https://demo.vivapayments.com/api/transactions/"+entry.TransactionId.String(),
+		"https://demo.vivapayments.com/api/transactions/"+entry.TransactionId.String()+"?amount="+amount,
-		map[string]string{"authorization": "Bearer " + s.basicAuth(),
+		map[string]string{"authorization": "Basic " + s.basicAuth(),
 			"content-type": "application/json",
 		},
 		nil,
 	)
 	if err != nil {
-		return database.PaymentEntry{}, err
+		return database2.PaymentEntry{}, err
 	}
 
 	var response TransactionResponse
 	err = readResponse(httpResponse, &response)
 	if err != nil {
-		return database.PaymentEntry{}, err
+		return database2.PaymentEntry{}, err
 	}
 	if response.StatusId == "F" {
 		paidAmount := int64(0)
 		entry.Amount = &paidAmount
 		entry.State = state.StateVoided
 	} else {
-		return database.PaymentEntry{}, errors.New("received invalid status = " + response.StatusId)
+		return database2.PaymentEntry{}, errors.New("received invalid status = " + response.StatusId)
 	}
 	return entry, nil
 }
@@ -241,17 +246,17 @@ func (s *Service) basicAuth() string {
 	return base64.StdEncoding.EncodeToString([]byte(s.MerchantId + ":" + s.ApiKey))
 }
 
-func (s *Service) HandleResponse(c *gin.Context, provider *database.PaymentEntryProvider, state state.PaymentState) (string, error) {
+func (s *Service) HandleResponse(c *gin.Context, provider *database2.PaymentEntryProvider, state state.PaymentState) (string, error) {
 	transactionId := uuid.MustParse(c.Query("t"))
-	orderId := database.OrderId(c.Query("s"))
+	orderId := database2.OrderId(c.Query("s"))
 	lang := c.Query("lang")
 	eventId := c.Query("eventId")
 	eci := c.Query("eci")
 
-	log.Printf("[%s] received error response for viva payment", orderId)
+	slog.Info("received error response from viva payment", "order_id", orderId)
 	entry, err := provider.FetchByOrderId(orderId)
 	if err != nil {
-		log.Printf("[%s] couldn't find payment info for viva payment", orderId)
+		slog.Error("couldn't find payment info for viva payment", "order_id", orderId)
 		return "", err
 	}
 
@@ -265,7 +270,7 @@ func (s *Service) HandleResponse(c *gin.Context, provider *database.PaymentEntry
 		return "", err
 	}
 
-	log.Printf("[%s:%s] received authorization response", entry.Id.String(), entry.State)
+	slog.Info("received authorization response", "entry_id", entry.Id.String(), "state", entry.State)
 
 	return "/entries/" + entry.Id.String(), nil
 }

domain/providers/viva/viva.go

@@ -1,6 +1,8 @@
 package viva
 
-import "payment-poc/database"
+import (
+	"payment-poc/domain/database"
+)
 
 type OrderRequest struct {
 	Amount              int64  `json:"amount"`
@@ -26,7 +28,7 @@ type TransactionCompleteRequest struct {
 }
 
 type TransactionResponse struct {
-	Amount    float64 `json:"Amount"`
+	Amount    int64  `json:"Amount"`
 	StatusId  string `json:"StatusId"`
 	ErrorCode int64  `json:"ErrorCode"`
 	ErrorText string `json:"ErrorText"`
@@ -37,9 +39,9 @@ type TransactionResponse struct {
 type TransactionStatus string
 
 const (
-	PaymentSuccessful    TransactionStatus = "F"
+	PaymentSuccessful    TransactionStatus = "C"
 	PaymentPending       TransactionStatus = "A"
-	PaymentPreauthorized TransactionStatus = "C"
+	PaymentPreauthorized TransactionStatus = "F"
 	PaymentUnsuccessful  TransactionStatus = "E"
 	PaymentRefunded      TransactionStatus = "R"
 	PaymentVoided        TransactionStatus = "X"
@@ -47,7 +49,7 @@ const (
 
 type TransactionStatusResponse struct {
 	Email      string            `json:"email"`
-	Amount     int               `json:"amount"`
+	Amount     float64           `json:"amount"`
 	OrderCode  database.OrderId  `json:"orderCode"`
 	StatusId   TransactionStatus `json:"statusId"`
 	FullName   string            `json:"fullName"`

domain/providers/wspay/service.go

@@ -10,10 +10,10 @@ import (
 	"github.com/gin-gonic/gin"
 	"github.com/google/uuid"
 	"io"
-	"log"
+	"log/slog"
 	"net/http"
-	"payment-poc/database"
+	"payment-poc/domain/database"
-	"payment-poc/state"
+	"payment-poc/domain/state"
 	"strconv"
 )
 
@@ -26,7 +26,7 @@ type Service struct {
 func (s *Service) UpdatePayment(entry database.PaymentEntry) (updatedEntry database.PaymentEntry, err error) {
 	var request = StatusCheckRequest{
 		Version:        "2.0",
-		ShopId:         s.ShopId,
+		ShopID:         s.ShopId,
 		ShoppingCartId: entry.Id.String(),
 		Signature:      CalculateStatusCheckSignature(s.ShopId, s.ShopSecret, entry.Id.String()),
 	}
@@ -47,16 +47,16 @@ func (s *Service) UpdatePayment(entry database.PaymentEntry) (updatedEntry datab
 		return database.PaymentEntry{}, err
 	}
 
-	if CompareStatusCheckReturnSignature(response.Signature, s.ShopId, s.ShopSecret, response.ActionSuccess, response.ApprovalCode, entry.Id.String()) != nil {
+	if CompareStatusCheckReturnSignature(response.Signature, s.ShopId, s.ShopSecret, response.ActionSuccess, response.ApprovalCode, entry.WsPayOrderId) == nil {
-		entry.Amount = &response.Amount
+		newValue := int64(response.Amount * 100)
+		entry.Amount = &newValue
 		newState := determineState(response)
 
 		if entry.State != newState && newState != "" {
-			log.Printf("Updated state for %s: %s -> %s", entry.Id.String(), entry.State, newState)
+			slog.Info("Updated state", "entry_id", entry.Id.String(), "state", entry.State, "new_state", newState)
 			entry.State = newState
 		}
-
+		entry.WsPayOrderId = response.WsPayOrderId
-		entry.State = state.StateCompleted
 	} else {
 		return database.PaymentEntry{}, errors.New("invalid signature")
 	}
@@ -89,12 +89,12 @@ func (s *Service) CompleteTransaction(entry database.PaymentEntry, amount int64)
 	if entry.State == state.StateAccepted {
 		var request = CompletionRequest{
 			Version:      "2.0",
-			WsPayOrderId: entry.Id.String(),
+			WsPayOrderId: entry.WsPayOrderId,
-			ShopId:       s.ShopId,
+			ShopID:       s.ShopId,
 			ApprovalCode: *entry.ApprovalCode,
 			STAN:         *entry.STAN,
-			Amount:       amount,
+			Amount:       strconv.FormatInt(amount, 10),
-			Signature:    CalculateCompletionSignature(s.ShopId, s.ShopSecret, entry.Id.String(), *entry.STAN, *entry.ApprovalCode, amount),
+			Signature:    CalculateCompletionSignature(s.ShopId, s.ShopSecret, entry.WsPayOrderId, *entry.STAN, *entry.ApprovalCode, amount),
 		}
 
 		httpResponse, err := createRequest(
@@ -113,7 +113,7 @@ func (s *Service) CompleteTransaction(entry database.PaymentEntry, amount int64)
 			return database.PaymentEntry{}, err
 		}
 
-		if CompareCompletionReturnSignature(response.Signature, s.ShopId, s.ShopSecret, entry.Id.String(), *entry.STAN, response.ActionSuccess, response.ApprovalCode) != nil {
+		if CompareCompletionReturnSignature(response.Signature, s.ShopId, s.ShopSecret, *entry.STAN, response.ActionSuccess, response.ApprovalCode, entry.WsPayOrderId) == nil {
 			entry.Amount = &amount
 			entry.State = state.StateCompleted
 		} else {
@@ -129,12 +129,12 @@ func (s *Service) CancelTransaction(entry database.PaymentEntry) (database.Payme
 	if entry.State == state.StateAccepted {
 		var request = CompletionRequest{
 			Version:      "2.0",
-			WsPayOrderId: entry.Id.String(),
+			WsPayOrderId: entry.WsPayOrderId,
-			ShopId:       s.ShopId,
+			ShopID:       s.ShopId,
 			ApprovalCode: *entry.ApprovalCode,
 			STAN:         *entry.STAN,
-			Amount:       entry.TotalAmount,
+			Amount:       strconv.FormatInt(entry.TotalAmount, 10),
-			Signature:    CalculateCompletionSignature(s.ShopId, s.ShopSecret, entry.Id.String(), *entry.STAN, *entry.ApprovalCode, entry.TotalAmount),
+			Signature:    CalculateCompletionSignature(s.ShopId, s.ShopSecret, entry.WsPayOrderId, *entry.STAN, *entry.ApprovalCode, entry.TotalAmount),
 		}
 
 		httpResponse, err := createRequest(
@@ -153,8 +153,8 @@ func (s *Service) CancelTransaction(entry database.PaymentEntry) (database.Payme
 			return database.PaymentEntry{}, err
 		}
 
-		if CompareCompletionReturnSignature(response.Signature, s.ShopId, s.ShopSecret, entry.Id.String(), *entry.STAN, response.ActionSuccess, response.ApprovalCode) != nil {
+		if CompareCompletionReturnSignature(response.Signature, s.ShopId, s.ShopSecret, *entry.STAN, response.ActionSuccess, response.ApprovalCode, entry.WsPayOrderId) == nil {
-			entry.State = state.StateCanceled
+			entry.State = state.StateVoided
 		} else {
 			return database.PaymentEntry{}, errors.New("invalid signature")
 		}
@@ -222,6 +222,7 @@ func (s *Service) HandleSuccessResponse(c *gin.Context, provider *database.Payme
 	entry.Success = &response.Success
 	entry.ApprovalCode = &response.ApprovalCode
 	entry.State = state.StateAccepted
+	entry.WsPayOrderId = response.WsPayOrderId
 
 	if _, err := provider.UpdateEntry(entry); err != nil {
 		return "", err
@@ -275,7 +276,7 @@ func CalculateFormSignature(shopId string, secret string, cartId string, amount
 	return hex.EncodeToString(hash.Sum(nil))
 }
 
-func CalculateCompletionSignature(shopId string, secret string, cartId string, stan string, approvalCode string, amount int64) string {
+func CalculateCompletionSignature(shopId string, secret string, wsPayOrderId string, stan string, approvalCode string, amount int64) string {
 	/**
 	Represents a signature created from string formatted from following values in a following order using
 	SHA512 algorithm:
@@ -290,7 +291,7 @@ func CalculateCompletionSignature(shopId string, secret string, cartId string, s
 	SecretKey
 	WsPayOrderId
 	*/
-	signature := shopId + cartId + secret + stan + secret + approvalCode + secret + strconv.FormatInt(amount, 10) + secret + cartId
+	signature := shopId + wsPayOrderId + secret + stan + secret + approvalCode + secret + strconv.FormatInt(amount, 10) + secret + wsPayOrderId
 	hash := sha512.New()
 	hash.Write([]byte(signature))
 	return hex.EncodeToString(hash.Sum(nil))
@@ -320,7 +321,7 @@ func CompareFormReturnSignature(signature string, shopId string, secret string,
 	}
 }
 
-func CompareCompletionReturnSignature(signature string, shopId string, secret string, stan string, actionSuccess string, approvalCode string, cartId string) error {
+func CompareCompletionReturnSignature(signature string, shopId string, secret string, stan string, actionSuccess string, approvalCode string, wsPayOrderId string) error {
 	/**
 	Represents a signature created from string formatted from following values in a following order using
 	SHA512 algorithm:
@@ -333,7 +334,7 @@ func CompareCompletionReturnSignature(signature string, shopId string, secret st
 	WsPayOrderId
 	Merchant should validate this signature to make sure that the request is originating from WSPayForm.
 	*/
-	calculatedSignature := shopId + secret + stan + actionSuccess + secret + approvalCode + cartId
+	calculatedSignature := shopId + secret + stan + actionSuccess + secret + approvalCode + wsPayOrderId
 	hash := sha512.New()
 	hash.Write([]byte(calculatedSignature))
 	if hex.EncodeToString(hash.Sum(nil)) == signature {
@@ -343,7 +344,7 @@ func CompareCompletionReturnSignature(signature string, shopId string, secret st
 	}
 }
 
-func CompareStatusCheckReturnSignature(signature string, shopId string, secret string, actionSuccess string, approvalCode string, cartId string) error {
+func CompareStatusCheckReturnSignature(signature string, shopId string, secret string, actionSuccess string, approvalCode string, wsPayOrderId string) error {
 	/**
 	Represents a signature created from string formatted from following values in a following order using
 	SHA512 algorithm:
@@ -356,7 +357,7 @@ func CompareStatusCheckReturnSignature(signature string, shopId string, secret s
 	ApprovalCode
 	WsPayOrderId
 	*/
-	calculatedSignature := shopId + secret + actionSuccess + approvalCode + secret + shopId + approvalCode + cartId
+	calculatedSignature := shopId + secret + actionSuccess + approvalCode + secret + shopId + approvalCode + wsPayOrderId
 	hash := sha512.New()
 	hash.Write([]byte(calculatedSignature))
 	if hex.EncodeToString(hash.Sum(nil)) == signature {

domain/providers/wspay/wspay.go

@@ -84,16 +84,16 @@ type FormCancel struct {
 type CompletionRequest struct {
 	Version      string
 	WsPayOrderId string
-	ShopId       string
+	ShopID       string
 	ApprovalCode string
 	STAN         string
-	Amount       int64
+	Amount       string
 	Signature    string
 }
 
 type CompletionResponse struct {
 	WsPayOrderId  string
-	ShopId        string
+	ShopID        string
 	ApprovalCode  string
 	STAN          string
 	ErrorMessage  string
@@ -103,7 +103,7 @@ type CompletionResponse struct {
 
 type StatusCheckRequest struct {
 	Version        string
-	ShopId         string
+	ShopID         string
 	ShoppingCartId string
 	Signature      string
 }
@@ -115,8 +115,8 @@ type StatusCheckResponse struct {
 	ApprovalCode                    string
 	ShopID                          string
 	ShoppingCartID                  string
-	Amount                          int64
+	Amount                          float64
-	CurrencyCode                    string
+	CurrencyCode                    int
 	ActionSuccess                   string
 	Success                         string // deprecated
 	Authorized                      string
@@ -125,7 +125,7 @@ type StatusCheckResponse struct {
 	Refunded                        string
 	PaymentPlan                     string
 	Partner                         string
-	OnSite                          int
+	OnSite                          string
 	CreditCardName                  string
 	CreditCardNumber                string
 	ECI                             string

go.mod

@@ -1,6 +1,6 @@
 module payment-poc
 
-go 1.19
+go 1.22
 
 require (
 	github.com/gin-gonic/gin v1.9.1
@@ -8,6 +8,7 @@ require (
 	github.com/jmoiron/sqlx v1.3.5
 	github.com/joho/godotenv v1.5.1
 	github.com/lib/pq v1.10.9
+	github.com/stripe/stripe-go/v72 v72.122.0
 )
 
 require (
@@ -26,7 +27,6 @@ require (
 	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
 	github.com/modern-go/reflect2 v1.0.2 // indirect
 	github.com/pelletier/go-toml/v2 v2.0.8 // indirect
-	github.com/stripe/stripe-go/v72 v72.122.0 // indirect
 	github.com/twitchyliquid64/golang-asm v0.15.1 // indirect
 	github.com/ugorji/go/codec v1.2.11 // indirect
 	golang.org/x/arch v0.3.0 // indirect

main.go

@@ -2,399 +2,51 @@ package main
 
 import (
 	"embed"
-	"errors"
-	"fmt"
 	"github.com/gin-gonic/gin"
-	"github.com/google/uuid"
 	"github.com/joho/godotenv"
-	"github.com/stripe/stripe-go/v72"
+	"log/slog"
-	"html/template"
-	"log"
 	"net/http"
 	"os"
-	"payment-poc/database"
+	"payment-poc/api"
 	"payment-poc/migration"
-	"payment-poc/providers/mock"
+	"runtime/debug"
-	stripe2 "payment-poc/providers/stripe"
-	"payment-poc/providers/viva"
-	wspay2 "payment-poc/providers/wspay"
-	"payment-poc/state"
-	"strconv"
 	"strings"
-	"time"
 )
 
 //go:embed db/dev/*.sql
 var devMigrations embed.FS
 
-type PaymentProvider interface {
-	CreatePaymentUrl(entry database.PaymentEntry) (updatedEntry database.PaymentEntry, url string, err error)
-	CompleteTransaction(entry database.PaymentEntry, amount int64) (database.PaymentEntry, error)
-	CancelTransaction(entry database.PaymentEntry) (database.PaymentEntry, error)
-
-	UpdatePayment(entry database.PaymentEntry) (updatedEntry database.PaymentEntry, err error)
-}
-
 func init() {
 	godotenv.Load()
-
+	if !hasProfile("dev") {
-	log.SetPrefix("")
+		gin.SetMode(gin.ReleaseMode)
-	log.SetFlags(log.Ldate | log.Ltime | log.Lshortfile)
+	}
+	if value := os.Getenv("LOG_FORMAT"); value == "json" {
+		slog.SetDefault(slog.New(slog.NewJSONHandler(os.Stdout, &slog.HandlerOptions{AddSource: true})))
+	}
 }
 
 func main() {
+	commit, buildTime := buildInfo()
+	slog.Info("build info", slog.String("commit", commit), slog.String("time", buildTime))
+
 	client, err := connectToDb()
 	if err != nil {
-		log.Fatalf("couldn't connect to db: %v", err)
+		slog.Error("couldn't connect to db", slog.String("err", err.Error()))
+		os.Exit(1)
 	}
 	if err := migration.InitializeMigrations(client, devMigrations); err != nil {
-		log.Fatalf("couldn't execute migrations: %v", err)
+		slog.Error("couldn't finish migration", slog.String("err", err.Error()))
+		os.Exit(1)
 	}
 
-	g := gin.Default()
+	server := api.SetupServer(client)
 
-	if !hasProfile("no-auth") {
+	port := ":" + getOrDefault("SERVER_PORT", "5281")
-		g.Use(gin.BasicAuth(getAccounts()))
+	slog.Info("app is ready", slog.String("port", port))
+	if err := http.ListenAndServe(port, server); err != nil {
+		slog.Error("Couldn't start server!\n", slog.Any("err", err.Error()))
 	}
-
-	g.SetFuncMap(template.FuncMap{
-		"formatCurrency":    formatCurrency,
-		"formatCurrencyPtr": formatCurrencyPtr,
-		"decimalCurrency":   decimalCurrency,
-		"formatState":       formatState,
-		"omitempty":         omitempty,
-	})
-
-	g.NoRoute(func(c *gin.Context) {
-		c.JSON(http.StatusNotFound, gin.H{"message": "no action on given url", "created": time.Now()})
-	})
-	g.NoMethod(func(c *gin.Context) {
-		c.JSON(http.StatusMethodNotAllowed, gin.H{"message": "no action on given method", "created": time.Now()})
-	})
-
-	backendUrl := envMustExist("BACKEND_URL")
-
-	paymentGateways := map[state.PaymentGateway]PaymentProvider{}
-	entryProvider := &database.PaymentEntryProvider{DB: client}
-
-	g.LoadHTMLGlob("./templates/*.gohtml")
-
-	if hasProfile(string(state.GatewayMock)) {
-		mockService := mock.Service{
-			BackendUrl: backendUrl,
-		}
-		mockHandlers(g.Group("mock"), entryProvider, &mockService)
-		paymentGateways[state.GatewayMock] = &mockService
-		log.Printf("Registered provider: %s", state.GatewayMock)
-	}
-
-	if hasProfile(string(state.GatewayWsPay)) {
-		wspayService := wspay2.Service{
-			ShopId:     envMustExist("WSPAY_SHOP_ID"),
-			ShopSecret: envMustExist("WSPAY_SHOP_SECRET"),
-			BackendUrl: backendUrl,
-		}
-		wsPayHandlers(g.Group("wspay"), entryProvider, &wspayService)
-		paymentGateways[state.GatewayWsPay] = &wspayService
-		log.Printf("Registered provider: %s", state.GatewayWsPay)
-	}
-	if hasProfile(string(state.GatewayStripe)) {
-		stripeService := stripe2.Service{
-			ApiKey:     envMustExist("STRIPE_KEY"),
-			BackendUrl: backendUrl,
-		}
-		stripeHandlers(g.Group("stripe"), entryProvider, &stripeService)
-		paymentGateways[state.GatewayStripe] = &stripeService
-		stripe.Key = envMustExist("STRIPE_KEY")
-		log.Printf("Registered provider: %s", state.GatewayStripe)
-	}
-	if hasProfile(string(state.GatewayVivaWallet)) {
-		vivaService := viva.Service{
-			ClientId:     envMustExist("VIVA_WALLET_CLIENT_ID"),
-			ClientSecret: envMustExist("VIVA_WALLET_CLIENT_SECRET"),
-			SourceCode:   envMustExist("VIVA_WALLET_SOURCE_CODE"),
-			MerchantId:   envMustExist("VIVA_WALLET_MERCHANT_ID"),
-			ApiKey:       envMustExist("VIVA_WALLET_API_KEY"),
-		}
-		vivaHandlers(g.Group("viva"), entryProvider, &vivaService)
-		paymentGateways[state.GatewayVivaWallet] = &vivaService
-		log.Printf("Registered provider: %s", state.GatewayVivaWallet)
-	}
-
-	g.GET("/", func(c *gin.Context) {
-		entries, _ := entryProvider.FetchAll()
-		c.HTML(200, "index.gohtml", gin.H{"Entries": entries})
-	})
-	g.GET("/methods", func(c *gin.Context) {
-		amount, err := strconv.ParseFloat(c.Query("amount"), 64)
-		if err != nil {
-			amount = 10.00
-		}
-		c.HTML(200, "methods.gohtml", gin.H{"Amount": amount, "Gateways": mapGateways(paymentGateways)})
-	})
-	g.GET("/methods/:gateway", func(c *gin.Context) {
-		gateway, err := fetchGateway(c.Param("gateway"))
-		if err != nil {
-			c.AbortWithError(http.StatusBadRequest, err)
-			return
-		}
-		if paymentGateway, contains := paymentGateways[gateway]; contains {
-			amount, err := fetchAmount(c.Query("amount"))
-			if err != nil {
-				c.AbortWithError(http.StatusBadRequest, err)
-				return
-			}
-			entry, err := entryProvider.CreateEntry(database.PaymentEntry{
-				Gateway:     gateway,
-				State:       state.StatePreinitialized,
-				TotalAmount: amount,
-			})
-			log.Printf("[%s:%s] creating payment with gateway '%s' for '%f'", entry.Id.String(), entry.State, gateway, float64(amount)/100.0)
-			if entry, url, err := paymentGateway.CreatePaymentUrl(entry); err == nil {
-				log.Printf("[%s:%s] created redirect url", entry.Id, entry.State)
-				entryProvider.UpdateEntry(entry)
-				c.Redirect(http.StatusSeeOther, url)
-			} else {
-				c.AbortWithError(http.StatusBadRequest, err)
-				return
-			}
-		} else {
-			c.AbortWithError(http.StatusBadRequest, errors.New("unsupported payment gateway: "+string(gateway)))
-			return
-		}
-	})
-	g.GET("/entries/:id", func(c *gin.Context) {
-		id := uuid.MustParse(c.Param("id"))
-		entry, err := entryProvider.FetchById(id)
-		if err != nil {
-			c.AbortWithError(http.StatusBadRequest, err)
-			return
-		}
-		c.HTML(200, "info.gohtml", gin.H{"Entry": entry})
-	})
-	g.POST("/entries/:id/complete", func(c *gin.Context) {
-		id := uuid.MustParse(c.Param("id"))
-		entry, err := entryProvider.FetchById(id)
-		if err != nil {
-			c.AbortWithError(http.StatusBadRequest, err)
-			return
-		}
-		if paymentGateway, ok := paymentGateways[entry.Gateway]; ok {
-			amount, err := fetchAmount(c.PostForm("amount"))
-			if err != nil {
-				c.AbortWithError(http.StatusBadRequest, err)
-				return
-			}
-			log.Printf("[%s:%s] completing payment with amount %f", id.String(), entry.State, float64(amount)/100.0)
-			entry, err = paymentGateway.CompleteTransaction(entry, amount)
-			if err == nil {
-				entryProvider.UpdateEntry(entry)
-				log.Printf("[%s:%s] completed payment", id.String(), entry.State)
-				c.Redirect(http.StatusSeeOther, "/entries/"+id.String())
-			} else {
-				c.AbortWithError(http.StatusInternalServerError, err)
-				return
-			}
-		} else {
-			if err != nil {
-				c.AbortWithError(http.StatusInternalServerError, errors.New("payment gateway not supported: "+string(entry.Gateway)))
-				return
-			}
-		}
-	})
-	g.POST("/entries/:id/cancel", func(c *gin.Context) {
-		id := uuid.MustParse(c.Param("id"))
-		entry, err := entryProvider.FetchById(id)
-		if err != nil {
-			c.AbortWithError(http.StatusBadRequest, err)
-			return
-		}
-		if paymentGateway, ok := paymentGateways[entry.Gateway]; ok {
-			log.Printf("[%s:%s] canceling payment", id.String(), entry.State)
-			entry, err = paymentGateway.CancelTransaction(entry)
-			if err == nil {
-				entryProvider.UpdateEntry(entry)
-				log.Printf("[%s:%s] canceled payment", id.String(), entry.State)
-				c.Redirect(http.StatusSeeOther, "/entries/"+id.String())
-			} else {
-				c.AbortWithError(http.StatusInternalServerError, err)
-				return
-			}
-		} else {
-			if err != nil {
-				c.AbortWithError(http.StatusInternalServerError, errors.New("payment gateway not supported: "+string(entry.Gateway)))
-				return
-			}
-		}
-	})
-	g.POST("/entries/:id/refresh", func(c *gin.Context) {
-		id := uuid.MustParse(c.Param("id"))
-		entry, err := entryProvider.FetchById(id)
-		if err != nil {
-			c.AbortWithError(http.StatusBadRequest, err)
-			return
-		}
-		if paymentGateway, ok := paymentGateways[entry.Gateway]; ok {
-			log.Printf("[%s:%s] fetching payment info", entry.Id.String(), entry.State)
-			entry, err = paymentGateway.UpdatePayment(entry)
-			if err == nil {
-				entryProvider.UpdateEntry(entry)
-				log.Printf("[%s:%s] fetched payment info", entry.Id.String(), entry.State)
-			}
-			c.Redirect(http.StatusSeeOther, "/entries/"+id.String())
-		} else {
-			if err != nil {
-				c.AbortWithError(http.StatusInternalServerError, errors.New("payment gateway not supported: "+string(entry.Gateway)))
-				return
-			}
-		}
-	})
-
-	log.Fatal(http.ListenAndServe(":5281", g))
-}
-
-func mockHandlers(g *gin.RouterGroup, provider *database.PaymentEntryProvider, mockService *mock.Service) {
-	g.GET("/gateway/:id", func(c *gin.Context) {
-		id := uuid.MustParse(c.Param("id"))
-		entry, err := provider.FetchById(id)
-		if err != nil {
-			c.AbortWithError(http.StatusBadRequest, err)
-			return
-		}
-		c.HTML(http.StatusOK, "mock_gateway.gohtml", gin.H{"Entry": entry})
-	})
-	g.GET("success", func(c *gin.Context) {
-		url, err := mockService.HandleResponse(c, provider, state.StateAccepted)
-		if err != nil {
-			c.AbortWithError(http.StatusInternalServerError, err)
-			return
-		}
-		c.Redirect(http.StatusSeeOther, url)
-	})
-	g.GET("error", func(c *gin.Context) {
-		url, err := mockService.HandleResponse(c, provider, state.StateError)
-		if err != nil {
-			c.AbortWithError(http.StatusInternalServerError, err)
-			return
-		}
-		c.Redirect(http.StatusSeeOther, url)
-	})
-}
-
-func mapGateways(gateways map[state.PaymentGateway]PaymentProvider) map[string]string {
-	providerMap := map[string]string{}
-
-	for key := range gateways {
-		providerMap[string(key)] = mapGatewayName(key)
-	}
-	return providerMap
-}
-
-func mapGatewayName(key state.PaymentGateway) string {
-	switch key {
-	case state.GatewayStripe:
-		return "Stripe"
-	case state.GatewayVivaWallet:
-		return "Viva wallet"
-	case state.GatewayWsPay:
-		return "WsPay"
-	case state.GatewayMock:
-		return "mock"
-	}
-	return ""
-}
-
-func fetchGateway(gateway string) (state.PaymentGateway, error) {
-	switch gateway {
-	case string(state.GatewayWsPay):
-		return state.GatewayWsPay, nil
-	case string(state.GatewayStripe):
-		return state.GatewayStripe, nil
-	case string(state.GatewayVivaWallet):
-		return state.GatewayVivaWallet, nil
-	case string(state.GatewayMock):
-		return state.GatewayMock, nil
-	}
-	return "", errors.New("unknown gateway: " + gateway)
-}
-
-func getAccounts() gin.Accounts {
-	auth := strings.Split(envMustExist("AUTH"), ":")
-	return gin.Accounts{auth[0]: auth[1]}
-}
-
-func fetchAmount(amount string) (int64, error) {
-	if amount, err := strconv.ParseFloat(amount, 64); err == nil {
-		return int64(amount * 100), nil
-	} else {
-		return 0, err
-	}
-}
-
-func vivaHandlers(g *gin.RouterGroup, provider *database.PaymentEntryProvider, vivaService *viva.Service) {
-	g.GET("success", func(c *gin.Context) {
-		url, err := vivaService.HandleResponse(c, provider, state.StateAccepted)
-		if err != nil {
-			c.AbortWithError(http.StatusInternalServerError, err)
-			return
-		}
-		c.Redirect(http.StatusSeeOther, url)
-	})
-	g.GET("error", func(c *gin.Context) {
-		url, err := vivaService.HandleResponse(c, provider, state.StateError)
-		if err != nil {
-			c.AbortWithError(http.StatusInternalServerError, err)
-			return
-		}
-		c.Redirect(http.StatusSeeOther, url)
-	})
-}
-
-func stripeHandlers(g *gin.RouterGroup, provider *database.PaymentEntryProvider, stripeService *stripe2.Service) {
-
-	g.GET("success", func(c *gin.Context) {
-		url, err := stripeService.HandleResponse(c, provider, state.StateAccepted)
-		if err != nil {
-			c.AbortWithError(http.StatusInternalServerError, err)
-			return
-		}
-		c.Redirect(http.StatusSeeOther, url)
-	})
-	g.GET("error", func(c *gin.Context) {
-		url, err := stripeService.HandleResponse(c, provider, state.StateError)
-		if err != nil {
-			c.AbortWithError(http.StatusInternalServerError, err)
-			return
-		}
-		c.Redirect(http.StatusSeeOther, url)
-	})
-}
-
-func wsPayHandlers(g *gin.RouterGroup, provider *database.PaymentEntryProvider, wspayService *wspay2.Service) {
-	g.GET("success", func(c *gin.Context) {
-		url, err := wspayService.HandleSuccessResponse(c, provider)
-		if err != nil {
-			c.AbortWithError(http.StatusInternalServerError, err)
-			return
-		}
-		c.Redirect(http.StatusSeeOther, url)
-	})
-	g.GET("error", func(c *gin.Context) {
-		url, err := wspayService.HandleErrorResponse(c, provider, state.StateError)
-		if err != nil {
-			c.AbortWithError(http.StatusInternalServerError, err)
-			return
-		}
-		c.Redirect(http.StatusSeeOther, url)
-	})
-	g.GET("cancel", func(c *gin.Context) {
-		url, err := wspayService.HandleErrorResponse(c, provider, state.StateCanceled)
-		if err != nil {
-			c.AbortWithError(http.StatusInternalServerError, err)
-			return
-		}
-		c.Redirect(http.StatusSeeOther, url)
-	})
 }
 
 func hasProfile(profile string) bool {
@@ -407,47 +59,25 @@ func hasProfile(profile string) bool {
 	return false
 }
 
-func formatState(stt state.PaymentState) string {
+func buildInfo() (string, string) {
-	switch stt {
+	revision := ""
-	case state.StateCanceled:
+	buildTime := ""
-		return "Otkazana"
+
-	case state.StateVoided:
+	if info, ok := debug.ReadBuildInfo(); ok {
-		return "Poništena"
+		for _, setting := range info.Settings {
-	case state.StateAccepted:
+			if setting.Key == "vcs.revision" {
-		return "Predautorizirana"
+				revision = setting.Value
-	case state.StateError:
+			} else if setting.Key == "vcs.time" {
-		return "Greška"
+				buildTime = setting.Value
-	case state.StatePreinitialized:
-		return "Predinicijalizirana"
-	case state.StateInitialized:
-		return "Inicijalizirana"
-	case state.StateCanceledInitialization:
-		return "Otkazana tijekom izrade"
-	case state.StateCompleted:
-		return "Autorizirana"
 			}
-	return "nepoznato stanje '" + string(stt) + "'"
-}
-
-func formatCurrency(current int64) string {
-	return fmt.Sprintf("%d,%02d", current/100, current%100)
-}
-
-func formatCurrencyPtr(current *int64) string {
-	if current != nil {
-		return fmt.Sprintf("%d,%02d", (*current)/100, (*current)%100)
-	} else {
-		return "-"
 		}
-}
-
-func decimalCurrency(current int64) string {
-	return fmt.Sprintf("%d,%02d", current/100, current%100)
-}
-
-func omitempty(value string) string {
-	if value == "" {
-		return "-"
 	}
+	return revision, buildTime
+}
+
+func getOrDefault(env string, defaultValue string) string {
+	if value, present := os.LookupEnv(env); present {
 		return value
+	}
+	return defaultValue
 }

makefile

@@ -1,30 +1,18 @@
 # scripts for building app
-# requires go 1.19+ and git installed
+# requires go 1.22+ and git installed
 
-VERSION := 0.1.0
+VERSION := $(shell git describe --tags --always)
-
-serve:
-	go run ./...
-
-setup:
-	go get
 
 docker-dev:
-	docker image build -t registry.s2internal.com/opgdirekt/payment-poc/backend:$(VERSION)-dev .
+	docker image build -t registry.bbr-dev.info/payment-poc/backend/dev:latest .
-	docker tag registry.s2internal.com/opgdirekt/payment-poc/backend:$(VERSION)-dev registry.s2internal.com/opgdirekt/payment-poc/backend:latest-dev
+	docker image push registry.bbr-dev.info/payment-poc/backend/dev:latest
-	docker image push registry.s2internal.com/opgdirekt/payment-poc/backend:$(VERSION)-dev
-	docker image push registry.s2internal.com/opgdirekt/payment-poc/backend:latest-dev
 
 
 docker-prod:
-	docker image build -t registry.s2internal.com/opgdirekt/payment-poc/backend:$(VERSION) .
+	docker image build -t registry.bbr-dev.info/payment-poc/backend:$(VERSION) .
-	docker tag registry.s2internal.com/opgdirekt/payment-poc/backend:$(VERSION) registry.s2internal.com/opgdirekt/payment-poc/backend:latest
+	docker tag registry.bbr-dev.info/payment-poc/backend:$(VERSION) registry.bbr-dev.info/payment-poc/backend:latest
-	docker image push registry.s2internal.com/opgdirekt/payment-poc/backend:$(VERSION)
+	docker image push registry.bbr-dev.info/payment-poc/backend:$(VERSION)
-	docker image push registry.s2internal.com/opgdirekt/payment-poc/backend:latest
+	docker image push registry.bbr-dev.info/payment-poc/backend:latest
-
-release:
-	git tag $(VERSION)
-	git push origin $(VERSION)
 
 test:
 	go test ./...

migration/migration.go

@@ -4,10 +4,11 @@ import (
 	"context"
 	"crypto/sha256"
 	"encoding/base64"
+	"errors"
 	"fmt"
 	"github.com/jmoiron/sqlx"
 	"io/fs"
-	"log"
+	"log/slog"
 	"sort"
 	"strings"
 	"time"
@@ -92,7 +93,8 @@ func validateMigrations(db *sqlx.DB, migrations map[string]Migration, migrationF
 }
 
 func executeMigration(db *sqlx.DB, name string, script string) error {
-	log.Printf("[INFO] script='%s' | migrations - executing", name)
+	logger := slog.Default().With(slog.String("script", name))
+	logger.Info("migrations - executing")
 	tx := db.MustBeginTx(context.Background(), nil)
 	var err error = nil
 	if _, e := tx.Exec(script); e != nil {
@@ -102,10 +104,10 @@ func executeMigration(db *sqlx.DB, name string, script string) error {
 		err = e
 	}
 	if err != nil {
-		log.Printf("[ERROR] script='%s' | migrations - failed executing", name)
+		logger.Error("migrations - failed executing", slog.String("err", err.Error()))
 		tx.Rollback()
 	} else {
-		log.Printf("[INFO] script='%s' | migrations - succesfully executed", name)
+		logger.Info("migrations - successfully executed")
 		tx.Commit()
 	}
 	return err
@@ -119,9 +121,9 @@ func validateMigration(name string, migration Migration, script string) error {
 	calculatedHash := hash(script)
 
 	if calculatedHash != migration.Hash {
-		err := fmt.Sprintf("migrations - mismatch in hash for %s (expected '%s', calculated '%s')", name, migration.Hash, calculatedHash)
+		err := errors.New(fmt.Sprintf("migrations - mismatch in hash for %s (expected '%s', calculated '%s')", name, migration.Hash, calculatedHash))
-		log.Printf("[ERROR] script='%s' err='%s' | migrations - failed executing", script, err)
+		slog.Error("migrations - failed validation", slog.String("script", name), slog.String("err", err.Error()))
-		return fmt.Errorf("migrations - mismatch in hashes for %s", name)
+		return err
 	}
 	return nil
 }

providers/mock/service.go

@@ -1,44 +0,0 @@
-package mock
-
-import (
-	"github.com/gin-gonic/gin"
-	"github.com/google/uuid"
-	"log"
-	"payment-poc/database"
-	"payment-poc/state"
-)
-
-type Service struct {
-	BackendUrl string
-}
-
-func (s Service) UpdatePayment(entry database.PaymentEntry) (updatedEntry database.PaymentEntry, err error) {
-	return entry, nil
-}
-
-func (s Service) CreatePaymentUrl(entry database.PaymentEntry) (updateEntry database.PaymentEntry, url string, err error) {
-	return entry, "/mock/gateway/" + entry.Id.String(), nil
-}
-
-func (s Service) CompleteTransaction(entry database.PaymentEntry, amount int64) (database.PaymentEntry, error) {
-	entry.Amount = &amount
-	entry.State = state.StateCompleted
-	return entry, nil
-}
-
-func (s Service) CancelTransaction(entry database.PaymentEntry) (database.PaymentEntry, error) {
-	entry.State = state.StateVoided
-	return entry, nil
-}
-
-func (s Service) HandleResponse(c *gin.Context, provider *database.PaymentEntryProvider, paymentState state.PaymentState) (string, error) {
-	id := uuid.MustParse(c.Query("id"))
-	entry, err := provider.FetchById(id)
-	if err != nil {
-		return "", err
-	}
-	entry.State = paymentState
-	_, err = provider.UpdateEntry(entry)
-	log.Printf("[%s:%s] received authorization response", entry.Id.String(), entry.State)
-	return "/entries/" + id.String(), err
-}

render.go

@@ -1,21 +0,0 @@
-package main
-
-import (
-	"encoding/json"
-	"log"
-	"net/http"
-)
-
-func render[T any](w http.ResponseWriter, r *http.Request, status int, response T) error {
-	if body, err := json.MarshalIndent(response, "", "  "); err == nil {
-		w.Header().Add("content-type", "application/json")
-		w.WriteHeader(status)
-		_, err = w.Write(body)
-		return err
-	} else {
-		w.WriteHeader(http.StatusInternalServerError)
-		log.Printf("couldn't parse response")
-		_, err = w.Write([]byte{})
-		return err
-	}
-}

templates/mock_gateway.gohtml

@@ -20,8 +20,8 @@
     <section class="container">
     <h2>Mock gateway {{.Entry.Id.String}}</h2>
     <p>{{formatCurrency .Entry.TotalAmount}}</p>
-    <a href="/providers/mock/success?id={{.Entry.Id.String}}" class="btn btn-success">Potvrdi plaćanje</a>
+    <a href="/mock/success?id={{.Entry.Id.String}}" class="btn btn-success">Potvrdi plaćanje</a>
-    <a href="/providers/mock/error?id={{.Entry.Id.String}}" class="btn btn-danger">Otkaži plaćanje</a>
+    <a href="/mock/error?id={{.Entry.Id.String}}" class="btn btn-danger">Otkaži plaćanje</a>
     </section>
 </body>
 </html>